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Pixel, display device comprising the pixel and driving method of the display device

a display device and pixel technology, applied in the field of pixels, can solve the problems of difficulty in layout design and manufacturing of display panels, difficulty in high-resolution display panels, and insufficient luminance in the entire panel, and achieve the effects of simple pixel circuit structure, high integration, and high resolution

Active Publication Date: 2014-05-29
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a pixel circuit and display device that uses a digital driving method to improve display quality and ensure uniformity and reliability. This is achieved by reducing the number of elements in the pixel circuit and ensuring the driving transistor operates in a saturation area, which prevents luminance changes in the display panel. The simplified design of the pixel circuit also improves productivity of the display device. Overall, the invention provides a display device that is appropriate for high integration and high resolution while ensuring durability and productivity.

Problems solved by technology

An analog-type driving method of a conventional display device increases the number of circuit elements in a pixel so that it cannot be applied to a large-sized panel, and causes problems in high-resolution display panel, particularly, FULL HD panel.
A conventional pixel circuit is formed of 7 to 8 transistors and 2 to 3 capacitors, and this becomes a difficulty in layout design and manufacturing of the display panel.
However, a driving transistor transmitting a driving current according to a data signal is operated in a linear area in the digitally driven pixel, and thus luminance is not uniform in the entire panel depending on a material of an organic light emitting diode and a distribution characteristic such as processing.
Thus, a failure such as long range uniformity (LRU) or a short range uniformity (SRU) occurs in the display panel, thereby causing deterioration of the display device.

Method used

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  • Pixel, display device comprising the pixel and driving method of the display device
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  • Pixel, display device comprising the pixel and driving method of the display device

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Embodiment Construction

[0035]The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0036]In order to clarify the present invention, parts that are not connected with the description will be omitted, and the same elements or equivalents are referred to by the same reference numerals throughout the specification.

[0037]Throughout this specification and the claims that follow, when it is described that an element is “coupled” to another element, the element may be “directly coupled” to the other element or “electrically coupled” to the other element through a third element. In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising”, will be understo...

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Abstract

A pixel, a display device including the same, and a driving method thereof. The display device includes: a data driver transmitting data signals; a scan driver generating and transmitting scan signals; a display panel including pixels, each emitting light with a driving current according to the data signals; a compensation signal unit generating and transmitting a compensation control signal for controlling simultaneous transmission of a predetermined bias voltage to each of the pixels before a data voltage according to the data signals is applied to each of the pixels; a power controller controlling voltage levels of the first power source voltage and the second power source voltage and supplying the level-controlled first and second power source voltages; and a timing controller generating the data signals by processing an external image signal and generating a plurality of driving control signals.

Description

CLAIM OF PRIORITY[0001]This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from an application for PIXEL, DISPLAY DEVICE COMPRISING THE PIXEL AND DRIVING METHOD OF THE DISPLAY DEVICE earlier filed in the Korean Intellectual Property Office on 29 Nov. 2012 and there duly assigned Serial No. 10-2012-0137231.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a display device and a driving method thereof. More particularly, the present invention relates to a display device including an organic light emitting diode (OLED) and a pixel that is digitally driven, and a driving method thereof.[0004]2. Description of the Related Art[0005]Recently, a display panel has increased in size and reduced in weight, and a stable driving method of a frame has been developed in order to display an accurate and clear image with high-integration and high-precision of a display device which is ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G09G3/34
CPCG09G3/34G09G3/3225G09G2300/0852G09G2310/0248G09G2320/045G09G3/30
Inventor CHOI, YANG-HWAKIM, CHEOL-MIN
Owner SAMSUNG DISPLAY CO LTD
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